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Australia Reels From Split Weather System, Suffers Effect Of “The Big Dry” And “The Big Wet”

by Jack Rosebro

Land surface temperature anomaly across Australia between 25 January and 1 February, 2009, during the first of two heatwaves in the Southeast as well as flooding in the North. The darkest reds and the darkest blues show a 10ºC temperature differential from baseline (white). Source: NASA. Click to enlarge.

As Australia’s record heat waves during the last week of January and first week of February overloaded urban energy, water, and transport systems in the southernmost states of South Australia and Victoria while intensifying hundreds of seasonal and man-made bushfires throughout the countryside, the northeastern state of Queensland has struggled to cope with the effects of tropical cyclones Charlotte and Ellie, which brought rain and “king tides” that have made two-thirds of that state a disaster zone, destroying livestock as well as key crops and amplifying outbreaks of disease.

As many as 260 to 300 people are feared dead from fire in Victoria, with 181 deaths confirmed. The projected deaths surpass the combined fatalities from all of Australia’s major bushfire disasters (e.g. Black Friday of 1939, Ash Wednesday of 1983) in recorded history. Full accounting of all human remains are expected to take several months.

Although flood losses are difficult to assess in Queensland, as floodwaters have not fully receded and more rain is forecast, several deaths have occurred in that state, and tens of thousands of cattle are expected to perish. Urban warnings have been issued for snakes and crocodiles, more than three hundred cases of dengue have been reported in one town alone, and some communities may be isolated by floodwaters for as long as eight weeks. Some A$500,000 in Queensland produce spoiled and had to be destroyed when flooded highways prevented trucks from reaching food distribution depots.

Australians have taken to calling the current protracted drought “The Big Dry”. Heavy annual precipitation in the North is traditionally referred to as “The Big Wet.”

Southern Cities See Record Temperatures, Little Water

Minimum and maximum temperatures for Adelaide and Melbourne between 25 January and 1 February, 2009. Temperatures in Melbourne were driven even higher by the second heatwave on the following weekend. Click to enlarge.

Late January—already a historically dry month for the south of Australia—brought heat waves to the southern states that were unprecedented in both temperature and duration, with daily highs of more than 40 ºC (104 ºF) in Melbourne for three days in a row, peaking at 45.1 ºC (113.2 ºF) on 30 January. Buckled train tracks and sagging power lines interrupted much of the city’s passenger train service, and residents were advised to conserve water.

Although Victoria Premier John Brumby had expressed confidence in the resilience of the city’s power systems, blackouts affected as many as half a million of the city’s residents at a time. Telephone and internet services for hundreds of thousands of people were interrupted when primary, secondary, and redundant power systems failed. Record heat returned within a week, reaching 46.4 ºC (115.5 ºF) in the city on 7 February, the highest temperature recorded in Melbourne since measurements began 154 years ago.

In South Australia, Adelaide suffered five consecutive days with temperatures above 40 ºC, peaking at 45.7 ºC (114.3 ºF) on 28 January. Some parts of South Australia saw night temperatures above 41 ºC (106 ºF) before sunrise, an event that “appears to be without known precedent”, according to Australia’s Bureau of Meteorology (BOM).

The January-February 2009 event also produced seven of the eight highest temperatures on record for the island of Tasmania, off the coast of Victoria. Temperatures at eight island sites reached or surpassed 40 °C (104 ºF), a mark which had previously been reached just sixteen times in the state’s recorded history, and only in the southeast. All eight sites that saw temperatures at or above 40 ºC this year are in the state’s northern half.

“I think this is a sneak preview of the future. It’s clear that once temperatures get above 40 or 43 degrees in some of our capital cities and particularly some of the rural areas, large impacts tend to occur. We’ve seen increases in fires, we’ve seen more heat stress and heat related deaths. We’ve seen blackouts, disruptions to many of our transport systems, greater water consumption and of course, more sleepless nights.”

—Kevin Hennessey, atmospheric research scientist, Australia Commonwealth Scientific and Research Organization, speaking on ABC Radio Australia

The heat waves added to existing urban water stress; Melbourne’s water supply, for example, was at a 25-year low, with reservoirs two-thirds empty prior to the heat waves, and both Melbourne and Adelaide were already operating under Stage 3 water restrictions. Victoria’s current “Target 155” water conservation program recommends a household water usage goal of no more than 155 liters (41 gallons US) of water use per person per day.

During the heat waves, however, Melbourne’s average personal daily water consumption averaged as much as 240 liters (63 gallons US) per person per day, or about 55% above target. As of 12 February, a new bushfire threatened the Yarra Valley’s Thompson Reservoir, which supplies water to the city, as well as the Longford oil and natural gas plant. Warmer weather and lightning strikes are expected in the area next week.

Australia’s cities often employ flexible water conservation goals, depending on water catchment levels that support a given city; for example, South East Queensland employed a “Target 140” campaign in 2007, when a water crisis coincided with a need to upgrade existing infrastructure. By comparison, per capita personal daily water use in the United States, excluding industry, can be as high as 400 to 600 liters (106 to 159 gallons US) per day.

As the cities sweltered, a leaked government report revealed that water flows to Australia’s Snowy River had been diverted to the Murray River by the state of New South Wales to produce power and irrigate crops, despite promises to restore the Snowy River’s natural flows beginning in 2000. Current flows are 4% of normal and 30% below agreed restoration levels. [1]

“Hell In All Its Fury Has Visited Victoria”

Satellite image of Victoria bushfires burning, 9 February 2009. Source: NASA. Click to enlarge.

Most of Victoria’s worst bushfires started 7 February, with fire fronts that Australian Prime Minister Kevin Rudd termed “hell in all its fury”, reaching as high as 35 meters (115 feet) in some areas. A University of Melbourne senior lecturer in fire ecology, Kevin Tolhurst, calculated that radiant heat from the fires would be enough to kill at distances of up to 140 meters (460 feet), with conditions similar to Dresden firestorms rapidly increasing body core temperatures and interrupting metabolic processes. Bushfires can produce their own volatile gases and oils, adding fuel to the fire.

Australia’s Bureau of Meteorology uses a Forest Fire Danger Index (FFDI) that calculates the combined effects of near-surface maximum temperature, total precipitation, relative humidity, and wind speed for a given day to determine the intensity of a blaze. A rating of 100 indicates that a fire is uncontrollable. On 7 February, the FFDI reached 400.

We’ve never seen a day like that. We have had the driest air recorded, and it was three degrees hotter than [1983’s] Ash Wednesday.

—David Jones, head of the BOM’s National Climate Centre

Much of Victoria’s rainfall has been below average for the past twelve years, and Australia has recorded a warmer than average year for the past seven years.

Impacts of Queensland Floods “Beyond Human Intervention”

Tropical cyclones Charlotte and Ellie brought heavy precipitation that stalled over Queensland rather than moving on, triggering flood warnings for the Barcoo, Burdekin, Diamantina, Georgina, Herbert, Landsborough, Murray, Thomson, and Tully rivers, Eyre Creek, and the Gulf Rivers, including the Nicholson, Flinders, Glibert, and Norman river systems.

Thousands of head of cattle were stranded across vast areas of open land by surrounding floodwaters, and emergency fodder drops were considered but ultimately deemed impractical because of the scale of the event. Queensland Cattle Council president Greg Barns judged that the floods would devastate the state’s beef industry, remarking that “the situation in many cases is really beyond human intervention.”[2] Queensland was hit hard by a 2007 deluge which was termed at the time a “one in a hundred years” event.

Role Of Climate Uncertain; Indian Ocean Dipole Remains Positive Three Years In A Row

Although scientists were careful to point out that no single heat or flood event can be conclusively tied to climate change, they warned that events such as the fires and floods of 2009 are consistent with climate models produced in the past, and are likely to be more common in the future.

In 2007, for example, the Intergovernmental Panel on Climate Change (IPCC) expressed “high confidence”—a 90% or greater likelihood—that climate change would bring greater risks to major infrastructure in Australia, with “design criteria for extreme events...very likely to be exceeded more frequently” by 2030, including more frequent heatwaves and flooding, as well as increased storm and fire damage and subsequent loss of life.[3] A report by Australia’s own Commonwealth Scientific and Research Organization (CSIRO) in the same year found that “substantial increase in fire weather risk” likely at most sites in south-eastern Australia.[4]

One potential threat multiplier for drought and bushfires is the Indian Ocean Dipole (IOD), a weather phenomenon that involves the oscillation of warmer and cooler sea surface temperatures (SST) between the eastern and western Indian Ocean. Although the IOD was identified in 1999[5], fossil studies indicate that it has existed for at least 6,500 years.

Negative and positive phases of Indian Ocean Dipole (IOD), with subsequent effects on Australia. Source: University of New South Wales. Click to enlarge.

The positive pole, or phase, of the IOD brings cooler and drier conditions to the eastern Indian Ocean as winds weaken, drying out southeast Australia and parts of Indonesia. At the same time, warming seas and increased precipitation occur in the western Indian Ocean, affecting monsoons in India and eastern Africa. The negative phase of the IOD flips these conditions, generating winds that pick up moisture from the western Indian Ocean, which then sweeps down towards southern Australia to deliver precipitation.

A team of scientists led by Caroline Ummenhofer and Matthew England of the University of New South Wales Climate Change Research Centre has concluded that the Indian Ocean Dipole is the key driver of moisture-bearing winds that are carried across the southern half of Australia.[6] The team was able to establish direct links between the IOD and all of Australia’s major droughts since 1885. A report of their findings has been submitted to Geophysical Research Letters.

“In Adelaide up until March last year, we’d only ever seen eight 35 degree days in a row. In March last year, we got fifteen, so doubled our record again. And currently Adelaide’s had nine 35 degree days in a row...The world is changing, it’s getting hotter and we’re starting to see things which previously would have been very rare or not happen at all.”

—David Jones, National Climate Centre, Bureau of Meteorology, speaking on ABC Radio Australia

Although the IOD normally oscillates between positive, negative, and neutral, it has been limited to positive and neutral phases since 1992, and has remained in a positive phase for the last three years. No such occurrence can be found in previous records of sea surface temperatures. Climatologists will not know for several months whether or not the IOD will remain in a positive phase for 2009.

Firefighters Call For Halving Of Greenhouse Gases by 2020

In an open letter posted in Australia’s The Age newspaper[7][7], the United Firefighters’ Union of Australia appealed to Prime Minister Rudd and Victoria Premier John Brumby to move quickly on climate change. Research by CSIRO, the National Climate Institute, and the Bushfire Council projects that a low global warming scenario could see catastrophic fire events in parts of regional Victoria every five to seven years by 2020, increasing to every three to four years by 2050, with up to 50 per cent more extreme danger fire days.

Firefighters know that it is better to prevent an emergency than to have to rescue people from it, and we urge state and federal governments to follow scientific advice and keep firefighters and the community safe by halving the country’s greenhouse gas emissions by 2020.

—Peter Marshall, National Secretary, United Firefighters’ Union of Australia

A “high global warming scenario”, however, could trigger catastrophic events as often as once a year in Mildura by 2050, extreme danger fire days in Bendigo and Canberra could double, with catastrophic events predicted as often as every eight years.

Given the Federal Government’s dismal greenhouse gas emissions cut of 5 per cent, the science suggests we are well on the way to guaranteeing that somewhere in the country there will be an almost annual repeat of the recent disaster and more frequent extreme weather events.

—Peter Marshall

Early estimates of losses from both disasters topped A$2 billion (US$1.4 billion). Late last year, re-insurer Munich Re reported that 2008 was the third worst year on record for insured losses, with nine of the ten largest natural catastrophes of the year related to weather. (Earlier post.)

A poll carried out by Accenture and released today found that eight out of ten (84%) consumers in Australia say that they are concerned by climate change and believe it will directly impact their life (81%). 60% of Australians were found to be quite or very optimistic that humans will be able to take the necessary actions in order to solve global climate change.

However, a 2007 poll found that 88% of people contacted in Australia said they would be willing to switch to energy companies offering low carbon emission products and services, yet a year later, only 17% had switched gas or electricity provider, and just 5% had changed their oil provider.

[1] Rick Wallace: NSW stealing Snowy’s precious flows. In The Australian, 6 February 2009
[2] Padraic Murphy, The Queensland floods will devastate the beef industry as livestock starve. In The Australian, 6 February 2009
[3] Kevin Hennessey et al.: IPCC Fourth Assessment Report, Working Group II: Australia and New Zealand. Cambridge University Press, 2007
[4] CSIRO: Climate Change in Australia - Technical Report 2007.
[5] N.H. Saji et al.: A dipole mode in the tropical Indian Ocean. In Nature, Volume 401, Issue 6751, 23 September 1999
[6] Bob Beale, University of New South Wales: Indian Ocean causes Big Dry: drought mystery solved. 5 February 2009
[7] Peter Marshall, Face global warming or lives will be at risk. In The Age, 12 February 2009



Actually there is outrage toward enviros by Victoria residents. The result of bans on brush cutting and burnoffs. We have seen this before in southern Cali where the law requires landowners to remove old growth brush. That process has saved thousands of homes over the last thirty years and the lives of firefighters and residents.

Australia will now understand how "don't touch the environment" is a hazard and danger to human habitation. And, that part of good stewardship is caring for the land so that it does not become a firetrap.

BTW, isn't CO2 a classic fire-retardant?


As these types of occurrences become more and more common denialists here and elsewhere will have to deal with the fact that their successful efforts at delaying climate change policies will have directly contributed to the coming mayhem. You will have blood on your hands.


There are no easy answers. The Greens might have invented some stupid policies that in fact put people in harms way by preventing tree removal, but there are negatives on either side of the argument.

1) Trees absorb CO2 so chopping them down removes natures CO2 scrubbers (and Australia also has a huge soil erosion problem because of excessive tree removal)

2) If the trees are 'back burnt' that also generates more CO2

3) But if the back burning isn’t done, then we see fuel levels rise to the point where we see absolute devastation like we have seen.

But above it all.... I'd have to say a 5% reduction target in 11 years time is pathetic! That's less than 0.5% per year. That's just business as usual with a couple of solar panels. Politicians are meant to have the fortitude to LEAD not be sheep and FOLLOW! At least the popular debate about whether climate change even exists is being resolved


Problems with back burning include fires getting out of control, smoke induced asthma attacks in children and destruction of immature trees. What has saved lives is three metre wide fire breaks in Western Australia and in Victoria several people survived in bunkers. It could be pointed out Victorians are among the world's highest per capita CO2 emitters because of their reliance on brown coal (lignite) fired electricity. Some of that same electricity failed when they needed water pressure in their hoses. Yet the 2010 emissions trading scheme has effectively exempted lignite based generation. This is classic short term thinking by politicians; grief over symptoms but buck passing over causes.


There is no shortage of Greeny-bashers in Australia either. The policy of the Greens party here actually includes plans for fuel reduction(backburning)in fire prone areas. I think there was insufficient planning in some areas where housing development was too close to forest, and no provision for fire shelters.

What many people overseas don't know about is the massive heat wave these areas experienced a week before. Temperatures exceeded 40C daily and climbed to 46C. These extremes dry out Australian Eucalypts and make them volatile. The fires on Black Saturday exceeded any previous events by 300%. Well equipped and experienced fire teams had to withdraw, when aerial water dumps were rendered useless with the speed of fire front exceeding 70 kph.

Many Australians died of CO2 poisoning and lack of oxygen. Some found dead had no signs of burn injury. Comments by 'sulleny' not only ignorant of climate change but insulting. For your info you need about 98% CO2 to extinguish fire, but less than 30% to kill anything that respires. Maybe you need to research more and stay away from bushfires.

Andrey Levin

Bush fires in Australia (including catastrophic mega fires) were and will be part of the natural vegetation cycle.

I refuse to use this tragedy to peddle any pet theories, and hope no one will.

No doubt, Aussies will enroll measures to minimize human and property losses from such events in the future.

My condolences to peoples lost their loved ones.


No ridiculous nay saying comments from Stan Peterson, Reel$$, etc?


Yeah, where IS the comic relief?


Did I actually type that? Damn, sorry I guess I really do need to get some sleep.


Its no secret mega fires have been a part of the Australian landscape for most of its History. Its the severity that is the difference. Whether people believe in 'pet' theories like climate change is their business and their strong and uncompromising belief, just like some people believe in God. My deepest sympathy goes out to my fellow Australians involved in the fires. I have seen seasoned firefighters interviewed on TV, some experienced with twenty and thirty years of major fires say they have never seen anything like what experienced last Saturday. Worldwide record-breaking floods, firestorms, and hurricanes are rife in this decade. If individuals continually refuse to recognize these violent indicators of climate change it will be at their own peril.


...and unfortunately everyone else.


"just like some people believe in God". No I don't think so. Since when has evidence for the existence of God been supported overwhelmingly by peer reviewed scientific literature?

C'mon wake up!


Saving lives isn't on the Green Freaks' agenda.

They want to reduce the world population to 500 million come hell or high water.

Wonder how many Greens would step up to the scaffold and volounteer to hang themselves for the cause.


"""Saving lives isn't on the Green Freaks' agenda.

They want to reduce the world population to 500 million come hell or high water."""

As a green, I think 500 million people would be a great population to have. However, I do not see eugenics as a way to achieve this, despite what many people seem to be suggesting greens are advocating (ridiculous). Rather, if we all had fewer children, then the population would naturally dwindle. Economists wouldn't like this because then their exponential growth supply/demand charts wouldn't be valid anymore, but they are living in imaginationland anyways.

This could be achieved by somehow penalizing those selfish people who have more than 2 or 3 kids. Obviously progressively increasing taxes aren't going to dissuade people from having five kids, all that would do is hurt the kids, and it's usually the stupid people that have more kids anyways (at least outside of the developing world. My grandparents had as many kids as most people in India currently do).


""""just like some people believe in God". No I don't think so. Since when has evidence for the existence of God been supported overwhelmingly by peer reviewed scientific literature?"""

On the subject of electric cars...

Well as a former Atheist I searched and searched for some science which would strengthen my beliefs and show how Dawkins' theories are valid on a molecular basis. His entire argument hinges on the assumption that new traits are acquired by random reorganization of our genes on a molecular level via mutation, into new functional ones. Well a quick review of the probabilities involved in this puts that theory to bed pretty fast. I went through old issues of the Skeptical Enquirer and anything else I could find. I could find nothing that would address this math.

It's not that Dawkins is wrong, but there is a hell of a lot more going on out there than Dawkins would like you to believe. Much like the early proponents of Newtonian physics. It all seemed obvious to them and it was. But relativity and quantum physics came along and showed that there is much much more going on than just classical physics. Just like with Dawkins' narrow minded pet theories.

I wish we could use science more to put to rest this banal, polarizing, endless, answerless debate over the existence of God and move on towards more meaningful knowledge and understanding of the cosmos, but scientists can be as guilty as the Jesus freaks of being narrow minded.


Mark, I suggest you go back to school if you want to learn about biology.



Several good points. The population does indeed need to stabilize. In Canada, were it not for immigration, there would be negative growth. Same in most of Europe. China, in spite of the protests of religious groups is at least addressing the problem. India is further behind due in large part to the lack of standing and education of women.

In theory, as the third world moves toward industrialization and higher standards of living - they too will produce less kids. The trick now is to grow those economies with sustainable technology, educate the populations and feed everyone on the way to the negative growth. Talk about big problems. But I believe it can and must be done. It requires broad minded thinking, assisted but un-dictated from the outside.

Dawkins is a typical narrow thinker. Of course there's a lot more going on in the world and in our galactic neighborhood. Dawkins has been reminded of a simple proof thereof: the medically acknowledged "Placebo Effect." Clinical changes in physiology occur merely because a patient "believes" they are being treated in some unique way. That's faith. And very hard for Dawkins and disbelievers to counter.


"Wonder how many Greens would step up to the scaffold and volounteer to hang themselves for the cause."

I'd like to remind Mannstein that a hanging scaffold requires operators. The trap is opened by lever. Thus the opportunity for volunteers to "hang themselves" is made more difficult. A sash cord, chair and overhead beam is all that's needed.

Comic relief per ai's request.


For a moment there I thought aussieneil was going to hijack the comments into a "climate change" or "global warming" debate. I am glad that no one here took dee bait bruddah Neil.

Now, aussieneil, your pronouncement "If individuals continually refuse to recognize these violent indicators of climate change it will be at their own peril"

Are you Nostradamus II, a world renowned climatoligist or just another wild eyed sheeple? Every one believes in climate change....a minority are convinced of AGW. The scientific community has both ends of the spectrum... but no proof on either end.



I have invented a new way to fight wildfires.
It combines electric power wires with fire hoses in order to power electric booster pumps.
The pumps allow large quantities of water to be moved over long distances to fight wildfires.

The same basic invention can be used to bring water, electric power, and communications to areas suffering from drought.

Please look at my website and contact me if you have any interest in these ideas.

Will S

sulleny said, "BTW, isn't CO2 a classic fire-retardant?"

In high concentrations, yes. At 390 ppm, do the math. And Australia is experiencing heat and drought unprecedented in the last two centuries, ironic that they have such a high CO2 emission per capita rate.

Will S

The alarm is ringing, and many here only want to hit Snooze and go back to dreams of continued BAU. One can avoid reality to a point, but can never be free from the consequences of avoiding reality.


Thank God for new acronyms! We were running out of slogans.


And they're still bitin'. Just don't mention God or Climate change in the same paragraph. The deniers get to excited want to resort to population control. Yep we sure need that. Comic relief II.

Will S

Rikki wrote;

Every one believes in climate change....a minority are convinced of AGW. The scientific community has both ends of the spectrum... but no proof on either end.

You don't speak for the scientific community (or the world's population at large, for that matter). If you want to understand what the scientific community is saying, see their own statements.

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